DOCTOR: I'd listen to Harry; he's a doctor. And if you want a second opinion, so am I.

HARRY: You mean the dark-haired chap who's trying to kill me all the time...

DOCTOR: Is a common, or garden, elf, yes.

NAOMI: People like him aren't common in any garden I've ever been in.

DOCTOR: Then there are a few planets where I really need to take you.

NAOMI: What were they shooting at us?

DOCTOR: Enchanted arrows.

NAOMI: No, what are they really called?

DOCTOR: Enchanted arrows! D'you think I'd make something like that up?

HARRY: You recall how you took great pains to make sure we got back to London?

DOCTOR: Yes.

HARRY: Well, you didn't take quite as many pains to make sure it was the correct year.

DOCTOR: Ahh.

HARRY: Or decade.

DOCTOR: Ooh.

HARRY: Or century.

DOCTOR: Hmm. I suppose that does explain the youthful experience. Is it too late to say I'm sorry?

HARRY: It being too late is entirely the problem.